Alias methods, but add some static arguments before or after the call

alias_args.rb

# Usage:
#   class Thing
#     def method_name(*args)
#       args
#     end
#     alias_shift_arg(:method_changed, :method_name, 1, 2, 3)
#   end
#   thing = Thing.new
#   thing.method_name("a").inspect #=> ["a"]
#   thing.method_changed("a").inspect #=> [1, 2, 3, "a"]

class Object
  class << self
    # Register an alias before the method is defined. Not for performance critical use
    def alias_preload(target, source) 
      self.send(:define_method, target) do |*orig_args, &block|
        self.send(source, *orig_args, &block)
      end
    end

    # Register a method that appends some arguments before calling the aliased method
    def alias_push_arg(target, source, *args)
      self.send(:define_method, target) do |*orig_args, &block|
        self.send(source, *(orig_args + args), &block)
      end
    end

    # Register a method that prepends some arguments before calling the aliased method
    def alias_shift_arg(target, source, *args)
      self.send(:define_method, target) do |*orig_args, &block|
        self.send(source, *(args + orig_args), &block)
      end
    end
  end
end